MacOS

Using the binary

Lem has nightly AppImage releases! for Linux, MacOS and Windows.

How to Fix “App Is Damaged and Can’t Be Opened” on OSX

Copy the app file to the applications folder and type the following in your terminal:

xattr -d com.apple.quarantine /Applications/lem.app

Installation from scratch

Install SBCL and ncurses

Using HomeBrew https://brew.sh/

brew install sbcl sdl2 sdl2_image sdl2_ttf

Install qlot

Automatic installer

curl -L https://qlot.tech/installer | bash

For an alternative installation, https://github.com/fukamachi/qlot#installation

Download and build the executable

Create the directories

mkdir $HOME/common-lisp
cd $HOME/common-lisp
git clone https://github.com/lem-project/lem.git
cd lem && make sdl2

or run make sdl2-ncurses to build Lem with the two interfaces in it. Then choose the interface at startup with -i / --interface, either “sdl2” or “ncurses”.

Add the executable to PATH

Copying the PATH to ~/.bashrc

export PATH="$HOME/common-lisp/lem:$PATH"

Make it an Application

To create an executable that you can run as a GUI you will need to use Automator.

Launch Automator
Choose ‘Application’ as the type for your document

You should now see three columns. In the second column there will be a collection of actions that you can run in this ‘application’. Scroll down until you see Run Shell Script. Double click on this and on the right you should now see a text box where you can enter your script:

Replace the contents of this shell script with the following:

source ~/.zshrc
cd ~/common-lisp/lem
./lem -i sdl2 &
exit 0

Save this as an application (this should be the default) with the name Lem to \Applications.

You should now be abel to run this as an application from the Applications folder.

Keyboard Layout

If your keyboard is a JIS layout, you need to put the following settings in $HOME/.lem/init.lisp

#+lem-sdl2
(lem-sdl2:set-keyboard-layout :jis)